>
> Is there a way to prevent Mathematica to turn a hyperbolic function (e.g.
> Cosh) into exponentials? I want to have:
>
> Integrate[Cosh[x],x] ==> Sinh[x]
>
> I tried to define an integration rule using Literal on the lhs, but then
> when I input "Integrate[Cosh[x],x]", the Cosh is turned into exponentials
> and therefore does not match the rule. Is there a Quote in mathematica?
> (Hold doesn't quite do the job either.)
>
> Any suggestion will be appreciated.
>
>
>
>
>
>
The only solution I have found to Mathematica's persistence in
decomposing hyperbolic functions is to define rules for convverting the
sum and difference of exponentials t my own sinh and cosh. It is useful
to define the appropriate rules for reducing expressions involving
hyperbolic functions, just as TrigReduce do for trigonometric functions.
--
William M. MacDonald
Professor of Physics
University of Maryland
Internet: mcdonald at quark.umd.edu
Bitnet:mAcdonald at cincom